ML14329A345

Robinson Draft RAI Spring 2014 Forced Outage SG Tube Inspection

ML14329A345
Person / Time
Site:	Robinson
Issue date:	11/13/2014
From:	Martha Barillas Plant Licensing Branch II
To:	Hightower R E Duke Energy Corp
References
MF5001
Download: ML14329A345 (3)

Text

1 NRR-PMDAPEm Resource From: Barillas, Martha Sent: Thursday, November 13, 2014 5:49 PM To: Richard.Hightower@duke-energy.com

Subject:

Robinson DRAFT RAI Spring 2014 forced outage SG tube inspection Attachments:

DRAFT RAI MF5001.docx Richard, By letter dated September 29, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14282A020), Duke Energy Progress, Inc. (the licensee) submitted information summarizing the results of the Spring 2014 steam generator tube inspections performed at H. B. Robinson Steam Electric Plant, Unit 2.

To complete its review, the NRC staff has the draft request for additional information (RAI) attached.

A response to the attached draft RAI is requested to be provided by December 15, 2014.

If you need a clarification call, please contact me to schedule the call as soon as possible.

Martha Barillas

Project Manager

Shearon Harris & H. B. Robinson NRR/DORL/Licensing Branch II-2 US Nuclear Regulatory Commission 301-415-2760

Hearing Identifier: NRR_PMDA Email Number: 1720 Mail Envelope Properties (Martha.Barillas@nrc.gov20141113174800)

Subject:

Robinson DRAFT RAI Spring 2014 forced outage SG tube inspection Sent Date: 11/13/2014 5:48:59 PM Received Date: 11/13/2014 5:48:00 PM From: Barillas, Martha Created By: Martha.Barillas@nrc.gov Recipients: "Richard.Hightower@duke-energy.com" <Richard.Hightower@duke-energy.com> Tracking Status: None Post Office: Files Size Date & Time MESSAGE 818 11/13/2014 5:48:00 PM DRAFT RAI MF5001.docx 25462 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

DRAFT REQUEST FOR ADDITIONAL INFORMATION SPRING 2014 STEAM GENERATOR INSPECTIONS H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT 2 DOCKET NO. 50-261 TAC NO. MF5001

By letter dated September 29, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14282A020), Duke Energy Progress, Inc. (the licensee) submitted information summarizing the results of the Spring 2014 steam generator tube inspections performed at H. B. Robinson Steam Electric Plant, Unit 2. These inspections were performed in March 2014 during a forced outage, which occurred during operating cycle 29. H. B. Robinson, Unit 2 entered a forced outage on March 8, 2014 because primary-to-secondary leakage was detected between February 27, 2014 and March 7, 2014. In a letter dated October 27, 2014 (ADAMS Accession No. ML14293A672), the U.S. Nuclear Regulatory Commission (NRC) staff summarized a conference call that was held with the licensee during the forced outage.

In order to complete the review, the NRC st aff requests responses to the follow questions:

1. During the March 24, 2014 conference call, it was stated that visual inspections were planned for the tubesheet and the downcomer region of the "C" steam generator.

Please discuss the results of these inspections.

2. Was an eddy current inspection performed on the leaking tube after the in-situ pressure test? If so, please discuss whether there was any change in the eddy current data pre-and post-test.

3. Please discuss the extent of the array probe inspections. For example, were the inspections performed from the H-star distance below the top of the tubesheet to the first tube support plate?

4. Please confirm that all service-induced indications have been reported, including those which may not have shown changes since prior inspections (e.g., HNC indications).